package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.client.HttpClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.UUID;

/**
 * @Author: wf
 * @Date: 2023/12/15 9:45
 * @Description:类描述
 **/
@Service
@Slf4j
public class UserServiceImpl implements UserService {
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    UserMapper userMapper;
    @Autowired
    WeChatProperties weChatProperties;

    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        String openId = getOpenId(userLoginDTO.getCode());
        //判断openid是够为空，如果为空表示登录失败，抛出异常
        if(openId == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否为新用户
        User user = userMapper.getByOpenId(openId);

        //如果是新用户则注册新用户
        if(user == null){
            user = User.builder().openid(openId).createTime(LocalDateTime.now()).build();
            userMapper.insert(user);
        }
        //返回用户信息
        return user;
    }

    private String getOpenId(String code){
        //调用微信接口服务，获得当前微信用户的openid
        HashMap<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authentication_code");
        String s = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSON.parseObject(s);
        String openId = jsonObject.getString("openid");
        return openId;
    }
}
